Download Simple Shift Installation and Tuning Guide for GM Trans Rev 1.2

Installation and Tuning
Guide for
GM Transmissions
Powertrain Control Solutions, LLC.
10511 Old Ridge Rd.
Ashland, VA 23005
Phone: (804) 227-3023
Fax: (804) 227-3005
www.PowertrainControlSolutions.com
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Simple Shift Installation and Tuning Guide
Thank you for purchasing your Simple Shift!
We understand how important it is for our product to perform flawlessly in order for your vehicle
to operate to its full potential. We appreciate the trust you’ve put in us and want to assure you
that by following this Instruction Manual and Tuning Guide you will be completely satisfied. It’s
just that simple… Simple Shift!
How to use this manual
This manual is designed to be a step by step guide to installing and tuning the Simple Shift
transmission controller. There are two main sections, Part 1 – Simple Shift Installation Guide,
and Part 2 – Simple Shift Tuning Guide. Each section is broken down into steps. Follow the
steps in order and do not skip any steps. Throughout the manual there will be “You need to
know” and “Important Note” reference sections that should be read and fully understood before
continuing. At the end of this manual will be a Troubleshooting and Diagnostics Guide in case
you run into any issues during your installation.
What you should have
Now that you have opened your Simple Shift
packaging you should have the following:
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•
•
•
Simple Shift Transmission Control
Unit
Main Harness
Main Harness Grommet
(3) Blue and (1) Gray Connector
Locks
For carbureted applications, a Remote
Mount TPS Adapter Kit is included in the
Simple Shift Carb kit or available from PCS,
part number TCM-6000. If any of these
parts are missing or damaged contact your
dealer before you continue.
Tools you may need
To install your Simple Shift properly the
following tools may be required:
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•
•
•
•
•
•
•
•
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Half-round file or de-burring tool
Simple Wiring Tools
5/16” wrench
7/16” wrench
1/2” wrench
Phillips screwdriver
Flat screwdriver
1-3/8” hole saw or 1” Conduit Punch-out – the required inner diameter of the hole to use
the included grommet is 1-3/8”.
Mounting Hardware (Bolts, Screws, Velcro, etc.)
Service Manual or Wire Diagrams for your vehicle
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Part 1: Simple Shift Installation Guide
Step 1: Find Mounting Location for your Simple Shift
Your Simple Shift unit should be mounted inside the vehicle to protect it from the
elements and on a flat surface to avoid distorting the case. Your Simple Shift should be
protected from excessive heat and vibration. Determine the best place to mount your
Simple Shift then move on to step 2. It is recommended that you leave it un-mounted to
make it easy to access/adjust until after the tuning process is completed, especially if
you plan to mount it in an inconspicuous place such as under the dashboard or
inside/behind a console or glove box area.
Step 2: Cut Main Harness Access Hole
Once you have decided on a place
to mount your Simple Shift unit,
you can now locate where the
main harness access hole will
need to be. A typical location for
the main harness access hole is
through the firewall, just above the
transmission tunnel and toward
the passenger side of the vehicle.
(See Figure 1) That should allow
the main harness to reach the
transmission, engine, and battery
without cutting or modifying the
harness.
IMPORTANT NOTE: If installing in large or long vehicles such as trucks, read ahead to step 4 –
Install the harness before locating or drilling an access hole. This will assure you have enough
harness length to properly install your Simple Shift.
If you do not have an available access hole, you will need to use a 1-3/8” hole saw or
punch set to cut a hole in the firewall. This 1-3/8” hole will allow the purple Simple Shift
connectors to pass through the firewall easily. It is highly recommended that you use a
file or other type of de-burring tool on the edges of the access hole to avoid scuffing or
tearing the wiring behind the purple Simple Shift connectors when pushing them through
the access hole
IMPORTANT NOTE: Before cutting the access hole, first cover the area with masking tape. This
will help reduce the chance of scratching the area around the hole during the cutting process.
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Simple Shift Installation and Tuning Guide
Step 3: Assemble Simple Shift Connectors
At the end of your main harness, there are two purple connectors of similar shape but different
in width. These two connectors will be pushed through the access hole and into the vehicle with
your Simple Shift unit.
1. Holding one of the
purple
connectors,
carefully bend the
wiring flush with the
back
of
the
connector. Be very
careful so none of the
wires are pulled out
of their cavities. Feed
it through the access
hole. Be careful that
you do not damage
the wires while feeding them through the access hole. (See Figures 2 and 3).
Repeat for the next connector.
2. In order to minimize the hole-size required to feed the harness through, we have shipped
the harness without installing the locks for the connectors. There are (3) blue and (1)
gray lock (See Figure 4). Carefully insert the locks one at a time, paying close attention
to their proper alignment (See Figure 5). When the locks have been pushed in
completely the lock clips will be engaged and will not pull back out (See Figure 6).
Repeat this step for all four locks.
DO NOT plug the purple connectors into the Simple Shift unit yet. This will be done once
the harness has been completely installed.
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Simple Shift Installation and Tuning Guide
Step 4: Install the Harness
The Simple Shift Main Harness has been designed to be very easy to install. Each connector is
clearly labeled and each heading in the section below reads exactly the same as the labels
found on its corresponding connector or wire in the Main Harness. All connector labels below in
BOLD are required for transmission operation.
•
•
TRANSMISSION CONNECTOR - This
connector is required for operation of your
Simple Shift unit.
See Table 1 Transmission Reference Chart and the
corresponding Figure for your transmission
connector location.
Transmission
Figure
4L60E 1993-96
4L60E 1997-UP
4L65E
4L70E
4L80E
4L85E
5L40
5L50
Figure A
Figure B
Figure B
Figure B
Figure C
Figure C
Figure D
Figure D
OUTPUT SHAFT SPEED SENSOR – This
connector is required for operation of your
Simple Shift unit. For all transmissions that
have an Output Shaft Speed Sensor we
Table 1 - Transmission Reference Chart
have added a ‘Y’, which allows you to plug
the Simple Shift harness directly into the transmission yet still leave you an access plug
for aftermarket speedometers or factory connectors of some kind that need Output Shaft
Speed Sensor access. See Table 1 and the corresponding Figure for your output shaft
speed sensor connector location
IMPORTANT NOTE: 4L60E transmissions have a different output shaft speed sensor connector on early
models (1993-1996) than they do on later models (1996-Up). The harness will take either style. You will find
two mini-harnesses tied to your main harness at the output shaft speed sensor connector. Simply use one of
the two clearly labeled mini-harnesses that fit your application.
•
INPUT SHAFT SPEED SENSOR - Only found on 4L80E and 4L85E transmissions. If
equipped, this connector is required for operation. See Figure C for connector location.
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Simple Shift Installation and Tuning Guide
Step 4: Install the Harness (continued)
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THROTTLE POSITION SENSOR - this connector is required for operation.
FOR ELECTRONIC FUEL INJECTED APPLICATIONS:
For cable-driven type throttle bodies you will want to splice into the existing throttle
position sensor wiring. Connect your throttle position sensor wiring according to the
chart below. Proper wiring techniques can be found on the support page at
www.powertraincontrolsolutions.com. Once you have completed this step you can skip
to BRAKE LAMP INPUT.
Simple Shift
TPS Wire Color
Red/White
Yellow/Black
Black/White
Function
+5V Power
Signal
Ground
Connect To
DO NOT USE if sharing sensor with ECU
Your TPS signal wire
Your TPS ground wire
IMPORTANT NOTE: DO NOT connect the TPS to a drive-by-wire throttle position sensor in any way.
Contact your dealer for information on how to install a separate throttle position sensor in this case.
FOR CARBURETED APPLICATIONS:
If you have a carbureted application and need a throttle position sensor, a Remote
Mount TPS Adapter Kit is included in the Simple Shift Carb kit or available from PCS,
part number TCM-6000.
What you should have
• 1 – Cable assembly with TPS sensor mounted on bracket
• 1 – Universal kickdown cable bracket
• 1 – bag of mounting hardware for TPS bracket (includes 3 bolts, 3 nuts, 3 spacers,
and a drill template)
Mounting your Remote TPS Adapter
Carburetor Kickdown Cable Bracket – If your carburetor has a kickdown cable bracket
then you can skip to Step 6 below. If it doesn’t then you’ll need to install the Universal
Kickdown Cable Bracket supplied with this kit. The Universal Kickdown Cable Bracket
installs very simply by using the rear carburetor mounting bolt on the same side of the
carburetor as the throttle lever. The bracket is held down by the bolt and steadied by the
flange and set screw found on the bracket beside the mounting hole. To install:
1. Remove the existing throttle cable bracket.
2. Remove the carburetor mounting bolt behind the throttle lever.
3. Using the carburetor mounting bolt, install the bracket as shown in Figure E. It may
require you to loosen the set screw before the bracket sits flat on the carburetor
mounting flange. Do not tighten the carburetor mounting flange bolt completely yet.
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Figure E
4. Now tighten the set screw until the kickdown bracket flange pushes up against the
back of the carburetor mounting flange tightly.
5. Tighten the carburetor mounting flange bolt.
6. Take the cable end of the remote TPS adapter assembly and push it through the
kickdown cable mounting hole shown in Figure F until it clicks into place.
Figure F
IMPORTANT NOTE – If you relocate your throttle cable to the universal kickdown bracket make sure it
moves freely, drops back all the way to idle, and does not over-sweep past wide open throttle. Severe
damage could occur if proper adjustment is not performed.
Figuring out where to mount your TPS adapter - Your Remote TPS Adapter has been
designed to easily mount out of the way for a clean looking installation. It can be
mounted along the firewall, the inner fender area, or even in the transmission tunnel
area. One thing to remember is you’ll want to mount it in a place that is easy to access
and is within reach of both the TPS connector on your Simple Shift harness and the
kickdown cable mounting location on your carburetor. To accomplish this, you may
need to loosen the brass adjusting nut on your cable assembly. It can usually be
loosened by hand but if need be a 1/2” wrench can be used (see Figure G).
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Figure G
TPS Sensor end – This end of the cable assembly will be mounted with the bolts,
spacers, and nuts found in your hardware bag. Use the drilling template found at the
end of these instructions as a template to drill the three ¼” holes required to mount this
bracket. Use the spacers between the bracket and the mounting location on your
vehicle.
Connecting your Cable – You can now attach the cable to your throttle lever assembly.
There are three ways to connect your TPS adapter cable to your throttle lever assembly.
They are:
1. Using the black clip adapter on a shouldered stud found on your throttle lever
2. Using the silver lever adapter on screw-headed stud found on your throttle lever
3. Using the cable itself running through a hole in the stud on your throttle lever
Whichever attachment method works best for your application is easily installed by
taking a flat blade screwdriver and loosening the brass stop found on the end of the
cable. Once you have loosened the stop you can slide it off and add whichever
attachment method is appropriate for your application. Now slide the brass stop back on
the cable and you are ready to adjust the cable for proper length.
Adjusting your cable – Your cable must be adjusted properly to assure correct operation
of your Simple Shift. To adjust your cable:
1. Move your throttle lever to just slightly open and tighten the brass stop on the cable
tightly against the mounting stud. This keeps tension on the cable at all times and
allows the Simple Shift to know where your lowest throttle point is.
2. While watching the TPS switch on the end of your cable assembly closely, open your
throttle to wide open throttle. Watch your TPS switch very closely. What you want to
see is for it to keep moving until your throttle lever stops moving. If your TPS switch
stops moving before your throttle lever stops you must adjust the lever on the TPS
switch. This lever can be easily adjusted by taking a small phillips screwdriver and
loosening the screw found on the TPS switch lever. The lever will slide off the TPS
switch, allowing you to slide the cable out of the mounting hole in the lever and move
it to another hole allowing more movement of the lever.
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Connecting your TPS connector - You can now connect the THROTTLE POSITION
SENSOR connector found in your Simple Shift harness to the TPS sensor on your
remote TPS cable assembly.
•
BRAKE LAMP INPUT - This is required to unlock your torque converter when you step
on the brake pedal. This wire should see +12v when your brake pedal is pressed. Tap
into the brake light circuit. See the service manual or wiring diagrams for your vehicle.
•
SPEEDOMETER -This wire is not required for operation of your Simple Shift unit. Its
purpose is to deliver a signal to early, older versions of electronic speedometers. Most
aftermarket speedometers will use the Output Shaft Speed Signal found previously in
these instructions. If your speedometer will not work with the Output Shaft Speed Signal
contact your dealer for technical assistance.
•
TACHOMETER - This wire is not required for operation of your Simple Shift unit but it is
recommended to offer comprehensive diagnostic capabilities. To utilize the full
diagnostic function of your Simple Shift, connect this wire to the tachometer output wire
of your ignition system. The TACHOMETER GROUND wire must also be connected
when the tachometer wire is being used. Connect this wire to a ground on the vehicle.
•
PCS EXPANSION - This connector is not required for operation of your Simple Shift unit.
It allows optional equipment, such as the Paddle Shifter or the D200 Touchscreen Dash
logger, to be connected to your Simple Shift system. Instructions on how to utilize this
connector will be included in the instructions for the optional expansion kits.
•
OPTIONAL COM NOT REQUIRED FOR USE - This connector is not required for
operation of your Simple Shift unit. It would only be utilized to communicate from the
Simple Shift to our proprietary software for custom calibrations.
•
+12V BATTERY -This wire is required for operation of your Simple Shift unit. It needs to
be connected to the positive terminal of your vehicles battery. If this is not connected
properly the Simple Shift unit will lose its TPS calibration and will not store diagnostic
codes.
•
SWITCHED +12V - This wire is required for operation of your Simple Shift unit. It needs
to be connected to the ignition/start system of your vehicle. It must have +12 volts while
in both the start and run positions and no power while in the off position. If this is not
connected properly the Simple Shift unit will not turn on and off correctly.
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CHASSIS GROUND - This wire is required for operation of your Simple Shift unit. It
should be connected to ground on the chassis of your vehicle or directly to the negative
post of your battery.
Step 5: Connect the Simple Shift
1. Now that you’ve installed the main harness it’s time to connect to your Simple Shift unit.
Simply push both of the purple connectors into their corresponding-sized cavities until
they click into place.
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Simple Shift Installation and Tuning Guide
Step 6: Install Main Harness Grommet
Now that you’ve installed your main harness and Simple Shift unit, the main harness
grommet can be installed to keep unwanted air and moisture from getting through your
main harness access hole. First, you must cut the grommet so it can be wrapped
around the harness just outside the access hole. Next, start on one end of the cut and
push the grommet into the access hole, pressing tightly with your thumbs or forefingers
as you work around it in a circle and into place.
YOU ARE NOW READY TO MOVE ON TO
PART 2 – SIMPLE SHIFT TUNING GUIDE
Part 2: Simple Shift Tuning Guide
Step 1: Initial Knob Adjustment
Figure 10 - Baseline Knob Configuration
Before driving the vehicle, the Simple Shift
knobs must be set to a baseline configuration
as shown in Figure 10 and described below.
1. Set low shift point knob to 0.
2. Set high shift point knob for approximately 500
RPM below the maximum RPM of your engine.
Refer to Table 1.
3. Set low shift firmness knob to 7.
4. Set high shift firmness knob to 7.
5. Set low converter lock knob to 0.
6. Set high converter lock knob to 0.
7.
If engine RPM is connected to the Simple Shift, set
the number of cylinders. If engine RPM is not
connected, set this knob to Off.
High Shift Point Knob
Setting
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
Approximate Shift
RPM
2500
2850
3200
3575
3925
4275
4650
5000
5350
5700
6075
6425
6775
7150
7500
Table 2 - High Shift Point Table
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Step 2: Simple Shift Functional Verification
1. Turn on Simple Shift – Place key in Run position without starting the engine. Verify the
Simple Shift is turning on by confirming the Diag light is powered (either green or red). If
the light does not turn on, refer to the troubleshooting guide. Do not continue with the
functional verification until the Simple Shift turns on with the key.
2. Calibrate Throttle - To calibrate the throttle specifically for your vehicle, the Simple Shift
must see the full range of the throttle. With the key in Run position and engine not
running, depress the throttle from rest position to full throttle and release.
IMPORTANT NOTE: Throttle calibration must be performed every time the Simple Shift loses a constant +12V
supply, such as a battery disconnect, or if Simple Shift is unplugged from the harness. Failure to perform this
calibration will result in inconsistent shifts and may damage the transmission.
3. Verify Throttle - Refer to Figure 11 for the location of the Diagnostic (Diag) light and the
Status light. To verify the throttle is calibrated watch the Status light (bottom light). The
light should be very dim or off while the pedal is released. The light should flash faster
with increasing throttle. The light should be solid green when the pedal is fully
depressed. The Status light will be solid red while the vehicle is not moving if there is a
TPS trouble code set.
Figure 11 - Diag and Status Lights
4. Check for Trouble Codes – Check the Diag light. If it is solid green then continue to the
next step. If it is flashing red, refer to the troubleshooting guide before continuing.
IMPORTANT NOTE: The following steps require looking at the Simple Shift’s Status and Diagnostics lights. This
requires a person to drive and a person to look at the Simple Shift. DO NOT attempt to drive by yourself and
continue with the functional verification or calibration
5. Verify Vehicle Speed - Start the vehicle. Place the vehicle into Drive and drive at a slow
speed with little throttle. Look at the Diag light. It should flash green relative to vehicle
speed. Only drive fast enough to verify the Simple Shift is reading vehicle speed. If the
Diag light does not flash, refer to the troubleshooting guide. If it flashes red, but
increases with vehicle speed, then your vehicle speed is working, but there are trouble
codes on the Simple Shift. Diagnose the trouble codes before continuing.
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6. Verify Shifting – While the vehicle is moving slowly (driving in first gear), observe the
Status light. This light flashes the current gear. Increase speed slightly so the
transmission shifts from 1st to 2nd. You should feel the transmission shift and the Status
light should now flash twice to indicate 2nd gear. If the transmission doesn’t shift, or the
Status light doesn’t change, refer to the troubleshooting guide.
You Need to Know - Understanding the Diag Light and the Status Light
The Diag and Status Lights are used to
provide feedback of the current state of the
Simple Shift.
The lights provide different information when
the vehicle is moving or not moving.
The table below provides a summary of the
light functionality.
Figure 13 - Diag and Status Lights
Diag Light
Vehicle not moving
(Vehicle speed not detected)
Vehicle moving
• Solid green: No trouble codes
present
• Flashes red: Flashes the trouble
code number which is described in
the troubleshooting guide.
• Flashes green: Flashes relative to
vehicle speed – no trouble codes
• Flashes red: Flashes relative to
vehicle speed – trouble codes are
present
• Flashes green: Flashes relative to
throttle position (off at 0% TPS, solid
green at 100% TPS)
• Solid red: TPS trouble code set
• Flashes green: Flashes relative to
current gear – torque converter
unlocked
• Flashes red: Flashes relative to
current gear – torque converter
locked
Status light
Step 3: Simple Shift Calibration
1. Check for Trouble Codes – During tuning, the Simple Shift should be monitored for
trouble codes. If at any point the Diag light flashes red, then trouble codes are
present. Refer to the troubleshooting guide and do not continue until the trouble
codes are diagnosed and resolved.
You Need to Know – Understanding how the Low and High knobs work together
The Simple Shift is programmed with a specific calibration for your transmission. Based on your engine,
vehicle, and personal preference you will use the high and low knobs to trim shift points, shift firmness,
and torque converter lockup.
The effect the knobs have on the calibration are based on throttle position. At 0% throttle, the Low knob
controls the calibration. At 100% throttle, the High knob controls the calibration. At throttle positions
between 0 and 100%, the knobs act together with each contributing some control over the calibration
based on the throttle position. At 50% throttle position, both knobs contribute 50% control over the
calibration.
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Step 3: Simple Shift Calibration - continued
2. Full Throttle Shift Points - This must be done
under a controlled environment such as a drag
strip or a chassis dyno so no speed limits are
exceeded. Shifts are going to occur at
approximately the same RPM for each shift;
therefore you may only need to make
adjustments using the 1st to 2nd shift as a test. If
you need the shift to happen at a lower RPM,
turn the knob counter clockwise toward the
negative numbers. If you need the shift to occur
at a higher RPM, turn the knob clockwise
toward the positive numbers. Table 2 is
provided as a reference, but the actual engine
RPM will vary with torque converter stall speed.
Figure 12 - Full throttle shift points
3. Full Throttle Shift Firmness - The knob was
set to 7 during the initial setup. This setting is
the maximum shift firmness. If the knob is set to
7 and the transmission is slipping, discontinue
driving immediately and contact your dealer.
If the full throttle shift firmness needs to be
decreased, rotate the knob counter clockwise. If
the full throttle shifts need to be firmed up,
increase the shift firmness by rotating the knob
clockwise.
When making adjustments, turn the knob by one
position then retest. Repeat as necessary. Keep
in mind that a softer shift may result in higher
engine RPM during the shift, therefore you may
have to adjust your high throttle shift point
selected in the previous step.
Figure 14 - Full throttle shift firmness
4. Low(light) Throttle Shift Points - Drive the
vehicle at light throttle and adjust the low throttle
shift points as necessary.
Rotate the knob clockwise to make the shifts
occur at a higher RPM. Rotate the knobs
counter clockwise to make the shifts happen at
a lower RPM.
Figure 15 – Low(light) throttle shift points
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Step 3: Simple Shift Calibration - Continued
5. Low(light) Throttle Shift Firmness - The knob
was set to 7 during the initial setup. This setting
is the maximum shift firmness. If the knob is set
to 7 and the transmission is slipping,
discontinue driving immediately and contact
your dealer.
Drive the vehicle at light throttle and adjust the
light throttle shift firmness as necessary. If the
light throttle shift firmness needs to be
decreased, rotate the knob counter clockwise. If
the light throttle shifts need to be firmed up,
increase the shift firmness by rotating the knob
clockwise.
Figure 16 – Low(light) throttle shift firmness
6. High Throttle Torque Converter Lockup – The
Simple Shift’s Status light indicates when the
torque converter is locked up. While moving, the
Status light flashes the current gear. If the light is
flashing green, then the converter is unlocked. If
the light is flashing red, then the converter is
locked. To lockup at a slower speed, turn the
knob counter clockwise. To lockup at a faster
speed, turn the knob clockwise.
Figure 17 - Full throttle converter lockup
7. Low(light) Throttle Torque Converter Lockup
- To lockup at a slower speed, turn the knob
counter clockwise. To lockup at a faster speed,
turn the knob clockwise.
Figure 18 – Low(light) throttle converter lock
Congratulations!!! You are now ready to enjoy your new Simple Shift!
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Simple Shift Installation and Tuning Guide
Troubleshooting and Diagnostic Code guide
Troubleshooting
Diag light does not turn on with the key - The Diag light will turn on when the Simple Shift
has the following connections:
Wire Color
Yellow
Red
Black
Connect To
Switched +12V
Constant
(Battery) +12V
Chassis
Ground
Simple Shift Pin
C16
A12
C1, C2
With a volt meter, verify voltage at Pin C16 and A12 of the Simple Shift Connector. Verify a
good ground by measuring continuity between C1, C2 and chassis ground.
The switched +12V and the battery +12V are fused in the harness. If voltage is not measured at
the appropriate pins, check the fuses first.
If voltage is found at the appropriate pins and there is a good ground, disconnect all connectors,
such as TPS, transmission, VSS, etc until there is only power and ground going to the Simple
Shift. If the Simple Shift still does not power up, contact your Dealer or PCS Support. If the
Simple Shift does power up, connect each connector one at a time to isolate which connection
is causing the issue. When the problem connector is found, refer to the wiring schematic for
your Simple Shift harness. If the problem can not be found, contact your Dealer or PCS
Support.
Diag light is always on even when the key is off - If the Diag light does not turn off, check the
yellow switched +12V input to the Simple Shift. This wire should only connect to +12V when the
key is on.
Status light does not change with throttle – When the vehicle is not moving, the Status light
should flash green at different rates based on throttle position. At full throttle, the light should be
solid green and at no throttle the light should be very dim green or off. The Status light will be
solid red while the vehicle is not moving if there is a TPS trouble code set. Check the Diag light
to see which code is set.
Status light is solid at no throttle and goes dim with more throttle.
The Status light must get brighter with more throttle. If it is on at no throttle and gets dim with
increasing throttle, the TPS +5v and ground are swapped or is the wrong type of sensor. This
can be corrected by swapping the +5V wire (Red with white stripe) and the sensor ground wire
(Black with white stripe) at the sensor.
Diag light does not flash with vehicle speed when the vehicle is moving.
The diag light flashes according to vehicle speed. If the Diag light does not flash when the
vehicle is moving the transmission may remain in 1st gear. Verify the Output Shaft Speed
Sensor connector is connected correctly. If another device is connected to the ‘Y’ cable
disconnect it and verify the Diag light flashes with speed. If still no flashing occurs test the
sensor per the factory service manual.
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Simple Shift Installation and Tuning Guide
Transmission does not shift.
For the controller to command a shift, it requires power, ground, and vehicle speed. Power and
ground can be verified by observing that the Diag light turns on. Vehicle speed can be observed
from the Diag light. As vehicle speed increases, the Diag light should increase the rate of
flashing. If the status light flashes a different gear but no shift was felt verify the transmission
has power at the solenoid connector. If power is present but no shifting occurs have the
transmission checked by a qualified transmission service facility.
Diagnostic Code List
Simple Shift includes a complete list of OE-style diagnostic codes that have been programmed
to include ‘limp modes’ so that you do not get stranded if at all possible when the worst occurs.
These codes can be viewed on your Simple Shift through the Diag light found on the end panel
of your Simple Shift control unit and are invaluable pieces of information for the transmission
professional or knowledgeable do-it-yourselfer.
Important Note - Codes 24,39,68,69,71,74,75 are disabled if RPM knob is set to 0
Important Note - Codes 74,85,86,87 do not apply to 4L60E
Code Name
21
Throttle Position
High
22
Throttle Position
Low
24
Output Speed
Sensor
28
Range Pressure
Switch
37
Brake Switch Stuck
Off
38
Brake Switch Stuck
On
39
TCC Stuck Off
52
System Voltage
High Long
Conditions for code
Throttle position voltage has been
above 4.9 Volts for more than 1
second.
TPS voltage is less than 0.20 volts for
more than 6 seconds.
Not in Park or Neutral, Engine RPM
greater than 3000, Input shaft speed
greater than 2800, Throttle position
greater than 10%, Output Speed Less
than 200. All condition met for 3
seconds.
PCM/TCM must see one of two illegal
combinations from pressure switch
manifold.
Sets when Brake is not pressed,
Vehicle speed is between 5 and 22
mph for greater than 6 seconds, then
Vehicle speed is greater than 20 mph
for greater than 6 seconds, for a total
of 7 times.
Sets when Brake is pressed, Vehicle
speed is greater than 20 mph for
greater than 6 seconds. Vehicle
speed is between 5 and 22 mph for
greater than 6 seconds, for a total of 7
times.
TCC slip is greater than 65 RPM for 2
seconds.
Sets when system voltage is greater
than 16 volts for 10 minutes.
Powertrain Control Solutions, LLC.
Rev 1.2
Default condition on
fault
Maximum line pressure.
Shift points fixed at 35%
throttle.
Maximum line pressure.
Shift points fixed at 35%
throttle.
2nd Gear with Maximum line
pressure.
Maximum pressure.
Assume Overdrive 4 is
selected.
None.
None.
None.
2nd Gear with Maximum line
pressure. Inhibit TCC.
804.227.3023
Page | 16
Simple Shift Installation and Tuning Guide
53
58
59
68
System Voltage
High
Trans Temp High
or TFT circuit short
to ground
Trans Temp Low or
TFT Circuit open
circuit
Component
Slipping
69
TCC Stuck On
71
Engine Speed
Circuit Low
72
Intermittent Output
Shaft Speed
73
Pressure Control
Circuit
74
75
79
81
Input Speed
Sensor Circuit
System Voltage
Low
Transmission Fluid
Overtemp
2-3 Shift Solenoid
Circuit Fault
82
1-2 Shift Solenoid
Circuit Fault
83
TCC Solenoid
Circuit Fault
Voltage is above 19.5 Volts for longer
than 30 seconds.
Transmission temperature must be
above 151 Deg. C (304 Deg. F) for 5
second.
Transmission temperature must be
below -37 Deg. C (-34 Deg. F) for 1
second.
No DTC 21,22,71,74. Engine speed is
200 RPM (or more) than input speed
for two seconds when in 4th gear and
TCC engaged.
No DTC 21,22,71,74. Sets when TCC
slip is between -25 and 25 RPM, TCC
solenoid is commanded off, TPS is
greater than 25%.
Sets when Engine speed is less than
50 RPM, transmission range is
R,D4,D3,D1 for 2 seconds.
Sets when Engine RPM is greater
than 300, range is D4,D3,D2, or D1,
Throttle position is greater than 25%
and Output shaft speed changes
more than 500 RPM in one
measurement period.
Force motor current is more than 0.16
Amps different than commanded
current.
No DTC 75. Sets when Range is not
park or neutral, engine speed greater
than 200 RPM Output speed greater
than 200 RPM, Input speed less than
50 RPM, for 2 seconds.
Sets when the ignition is on, voltage
is less than the following table:
2nd Gear with Maximum line
pressure. Inhibit TCC.
TCC always commanded in
3rd and 4th gear.
Inhibit TCC.
Maximum line pressure.
None.
None.
2nd Gear with Maximum line
pressure.
Maximum line pressure.
None.
2nd Gear with Maximum
pressure. Inhibit TCC.
-40F (-40C) = 7.3 volts
194F (90C) = 10.3 volts
302F (150C) = 11.7 volts
Engine Speed is greater than 1000
rpm for 4 seconds.
No DTC 58. Sets when transmission
fluid temperature is greater than 295F
(146C), for 30 minutes.
PCM\TCM detects an open circuit,
short to battery, short to ground, or
over-current condition on the shift
solenoid “B” circuit.
PCM\TCM detects an open circuit,
short to battery, short to ground, or
over-current condition on the shift
solenoid “A” circuit.
PCM\TCM detects an open circuit,
short to battery, short to ground, or
over-current condition on the shift
solenoid “A” circuit.
Powertrain Control Solutions, LLC.
Rev 1.2
None.
2nd and 3rd gears only or 1st
and 4th gear only.
2nd and 3rd gears only or 1st
and 4th gear only.
Inhibit TCC operation.
804.227.3023
Page | 17
Simple Shift Installation and Tuning Guide
85
86
87
Undefined Ratio
Error
Low Ratio Error
High Ratio Error
No DTC 21,22,24,38,71,72,87.
Sets when TPS is greater than 25%,
not in P,N,or 4th, Engine speed is
greater than 300 rpm, Vehicle speed
is greater than 7mph, Ratio falls out of
following table for 2 seconds.
Gear
1
2
3
REV
Low Limit
2.38
1.43
.95
1.97
High Limit
2.63
1.58
1.05
2.17
No DTC 21,22,24,38,72,74.
Sets when not in P,R,N, RPM is
greater than 300rpm, TPS is greater
than 25%, VSS is greater than 7mph,
Transmission ratio matches 3rd or 4th
when 1st or 2nd gear is commanded,
for 6 seconds.
No DTC 21,22,24,38,72,74.
Sets when not in P,R,N, RPM is
greater than 300rpm, TPS is greater
than 25%, VSS is greater than 7mph,
Transmission ratio matches 1st or
2nd gear when 3rd or 4th is
commanded, for 6 seconds.
Powertrain Control Solutions, LLC.
Rev 1.2
2nd Gear with Maximum line
pressure.
2nd Gear with Maximum line
pressure.
2nd Gear with Maximum line
pressure.
804.227.3023